You've Heard of a 3PL. So What Is a 4PL?

If you've spent time in logistics, you know what a 3PL does and you know the difference between one that just moves freight and one that truly operates as an extension of your team. Carrier relationships, warehousing capacity, transportation expertise and real accountability. For many shippers, a strong 3PL is exactly the right model.

As supply chains grow more complex, a new question surfaces: who manages all of it? Not just one lane or one mode, but the whole supply chain. That's the question a fourth-party logistics (4PL) model is designed to answer.

So What Exactly is a 4PL?

A strong 3PL brings real execution and real results. Jarrett brings that, and builds on it with carrier management, vendor coordination, proactive problem-solving, solutions built around your specific operation. That is the foundation.

A 4PL expands that scope. Rather than managing one piece of the operation, a 4PL sits above the entire supply chain, coordinating across every provider a shipper uses, regardless of who those providers are. There is one point of accountability for every mode, every partner and every system.

What makes Jarrett different is that we're not just an orchestration layer. We execute. We bring the full 3PL capability, experienced people, proven processes, carrier density and we scale it across your entire supply chain as a 4PL. That's not common. Most 4PLs manage from a distance. Jarrett manages from the floor.

The Real Differentiator: Technology and People, Working Together

Effective 4PL management comes down to two things: the ability to connect every system in a supply chain, and the ability to act on what those connections reveal. Many providers do one well. A strong technology platform can give you visibility across your network, but without experienced people behind it, that data does not drive decisions. An experienced logistics team can manage complexity — though the right integrations are what turn that expertise into faster, more informed decisions.

Jarrett is built to deliver both, combining a no-code integration platform that connects every system and partner in your network with a 24/7/365 team of logistics professionals who actively manage your freight from pickup to delivery. The technology and the people are built to work together

Jarrett LINC: The Connectivity Engine Behind the Modern 4PL

Jarrett LINC is a no-code integration platform that connects your ERP, TMS and other internal systems directly to Jarrett's transportation network, and to virtually any partner in your supply chain ecosystem.

• No coding or IT involvement required. Connections that once took weeks can be established in hours.
• Works with virtually any system already in use - ERPs, TMSs, WMSs and carrier platforms. All without requiring partners to change their tech.
• Enables real-time data exchange and automated workflows, replacing manual emails and spreadsheets with clean digital execution.
• Scales as your network grows, adding a new provider does not mean starting a new integration project.

For a 4PL, this kind of open, adaptable connectivity is essential. It means Jarrett can sit at the center of your supply chain and speak the language of every provider in it without locking you into a proprietary ecosystem or forcing your partners to change how they operate.

The Jarrett Routing Center: Where Integration Meets Human Expertise
Technology creates connections. The Jarrett Routing Center activates them. 

Operating 24/7/365, the Jarrett Routing Center functions as a true supply chain control tower - staffed by experienced logistics professionals who actively monitor, manage and optimize your freight in real time. It's not a call center. It's an extension of your operations team.

• Active shipment monitoring from pickup to delivery with proactive intervention before issues become disruptions.
• Dedicated coordinators who know your vendors, products and priorities, serving as a true extension of your team.
• Intelligent carrier-matching that uses performance data, preferred lanes and capacity trends to connect shipments with the most reliable partners.
• Real-time analytics surfacing cost-saving opportunities and performance trends, backed by live support available every hour of every day.

Is a 4PL the Right Fit?

• Managing logistics is consuming more internal time than it should - coordinating multiple providers, systems and lanes is a real burden.
• Visibility across the full network is fragmented, making it hard to get ahead of problems before they reach customers.
• Technology integrations are slow or expensive, and adding a new provider still means a project for your IT team.

At Jarrett, we've spent over two decades building the expertise, the relationships and the technology to serve as a true 4PL, with the 3PL execution capability to back it up. Jarrett LINC connects your systems with every provider in your network and our Routing Center manages what those connections make visible.

 
Ready to stop managing logistics and start leading your business? Book a meeting.